He's talking about his, well, private area being bad to the bone. He can make a rich woman beg for more, he can even make a good girl do bad things, old woman will blush from it, and last but not least, like Madonna said, like a virgin because they squeal from it. He might as well have said Big To The Bone! The head nurse looked up, said leave this one alone! Circumcision...

So, only women who have been with the dude know... He's bad to the bone...